key_exists

Synopsis

Determine if the keyword exists in the crate.

key_exists(crate, name)

Description

• crate - input crate
• name - the keyword to check

The key_exists command returns True if the keyword exists and False if not. The comparison is case-insensitive.

The get_key_names() routine ("ahelp get_key_names") can be used to find the names of all the keywords in a Crate.

Example

>>> cr = read_file("evt2.fits")
>>> key_exists(cr, "DETNAM")
True
>>> key_exists(cr, "detnam")
True

Note that the check is case-insensitive.

Changes in CIAO 4.4

The return value is now True or False rather than 1 or 0.

Bugs

See the bug pages on the CIAO website for an up-to-date listing of known bugs.

Refer to the CIAO bug pages for an up-to-date listing of known issues.

See Also

contrib

add_keyval

crates

add_key, col_exists, cratekey, delete_key, get_key, get_key_names, get_keyval, is_pha, is_rmf, is_virtual, set_keyval